Output power of 1200 W CW / SSB in the field KF, 700W in the band of 50 MHz Power 50V 35A efficiency of 73-75% frequency range 1.8 to 50 MHz switching bands automatic power control approx. 30-40W, set automatically by the system ALC Max SWR antenna 1: 2.0 The used transistor: 1x LDMOS BLF188XR […] Read more
The KAT500 is a high power autotuner that can be used with both the K3/KPA500 and all other HF amplifiers and transceivers. The KAT500 uses the same topology and high performance tuning algorithms as the popular 100W autotuner in the K3. Typical matching range at 500 W is up to 10:1 on most bands. (slightly […] Read more
A Compact Accessory Panel for Contesting, DXing, and Customized Station Control Our new K-Pod is the ideal companion to your Elecraft K3 or K3S Transceiver, maximizing both convenience and operating efficiency. At only 3.5 x 3 x 1 inches (9 x 7.5 x 2.5 cm), it can be placed anywhere the action is, typically next […] Read more
The Monitor Sensors 630m Transverter enables any Amateur Radio Station, equipped with a conventional HF transceiver, immediate, all mode, access to the new 472-479 kHz, 630m band.
$660USD + freight To order, email: email@example.com
|RF frequency range||472 to 479 kHz|
|IF frequency range||1802 to 1809 kHz (others available in the 160m band)|
|Transmission mode||CW, SSB, WSPR, and all other data modes|
|Output Power||50 Watts Continuous, 100% duty cycle @13.8V supply|
|Input and Output Impedance||50 Ohms|
|Supply voltage||13.8 VDC @ 15 Amps nominal, 10-16 VDC operational|
|Rx Noise Floor||-125 dBm (500Hz bandwidth)|
|Rx 3dB compression point||+15 dBm (Rx attenuator out)|
|Rx IF rejection||better than 75dB|
|Rx conversion gain||+6dB nominal|
|Roofing filter in-band ripple||+/- 1.5dB|
|Tx 3rd order IMD||-33 dB below PEP, typical at 50W output|
|Tx 5th order IMD||-45 dB below PEP, typical at 50W output|
|Tx harmonics and spurii||All better than -50dB|
|Tx conversion gain||+10dB nominal|
|Power input connector||2 x Anderson PP15/45|
|RF connectors||3 x SO239|
|PTT connectors||2 x RCA|
The Monitor Sensors 630m Transverter enables any Amateur Radio Station, equipped with a conventional HF transceiver, immediate, all mode, access to the new 472-479 kHz, 630m band. The receiver design incorporates a 7 pole Chebyshev filter, 7kHz wide roofing filter and a 5 pole Chebyshev filter in cascade before the double balanced, commutating mixer, fed by an ultra stable, temperature compensated, extremely low phase noise, MEMS local oscillator.
The mixer is followed by a Chebychev band pass filter into an ultra linear, low noise, current feedback, IF amplifier. A CW signal at -130dBm is readable at the output and yet the onset of compression is not reached until +11dBm. A front end 20dB attenuator can be switched in for even higher signal handling. Overall receiver gain is set to +6dB, or -14dBm with the attenuator active.
The transmitter input circuit incorporates a 0-14 dB switched step attenuator to prevent over driving. The same mixer and local oscillator are used on the transmit side. The PA uses 6 rugged lateral FETs in class AB push-pull to easily achieve the 50 watts rated output.
Lateral FETs are inherently linear and temperature stable. The transmitter can be run at full power, indefinitely, into a short or open circuit without any damage to the FETs. Transmit-receive switching is automatic with user selectable VOX delay. Alternatively the PTT line may be used. The Transverter employs extensive and accurate metering. Power input and output, SWR, Frequency, Attenuation in use, Temperature, Supply Voltage, Current and Resistance are displayed.
Transmission is inhibited if frequencies outside the 472-479 kHz band are detected. A tuning screen may be selected which displays SWR in digital and graphical form for easy antenna adjustment. The menu system is self explanatory and users report no manual is needed, although one is supplied.
A USB socket is provided for future code upgrades (free of charge) from the Monitor Sensors web site. The Transverter has been designed for the best possible protection against accidental mishaps. It will survive reverse polarity supply and the injection of 100 watts of HF into any of its ports whether in transmit or receive mode. If supply current exceeds 20 Amps, the supply is cut in 2 microseconds.
This electronic breaker can be reset by simply switching off and on again. The transmitter will shut down in the unlikely event that the internal heat sink reaches 100°C. The cooling fan is under the proportional control of the microcomputer and begins operation above 35°C. Any unusual operation will cause the screen to turn red and an appropriate warning will be displayed.
3D animation by Jeremy Cleaveland, KE0CGU Read more
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